Hello, I have been using an add-on/extension (''Calendar Data Extractor'') in Google Sheets to extract data from a Google calendar. It used to work perfectly in Firefox but now it no longer appears as an extension when I use Firefox. I tested it in Chrome and it is still functioning perfectly with Chrome. However, as Firefox is my preferred browser and default browser, I would like to find out if it is a setting in Firefox or a wider issue preventing it from appearing. Perhaps the developer hasn't updated the add-on for Firefox. The first image below shows it appearing in Chrome. The second image shows what it looks like in Firefox. Any advice will be appreciated. Many thanks.